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2017 Fiscal Year Annual Research Report

乳幼児てんかん性脳症の遺伝要因と分子病態の解明

Research Project

Project/Area Number 16H05160
Research InstitutionHamamatsu University School of Medicine

Principal Investigator

才津 浩智  浜松医科大学, 医学部, 教授 (40402838)

Project Period (FY) 2016-04-01 – 2019-03-31
Keywords全エクソーム解析 / 新規責任遺伝子 / 変異ノックインマウス
Outline of Annual Research Achievements

1)新規症例の全エクソーム解析: H29年度に37症例の全エクソーム解析を施行した。うち、14症例(38%)で病的変異を同定した。XHMMとNord scriptの2つのアルゴリズムを用いたコピー数解析によって、1p36欠失症例を1例と6q22.1 の130kb の欠失が同定され、コピー数解析の有用性が再確認できた。

2)新規責任遺伝子の同定: てんかん性脳症の新規責任遺伝子としてシナプス可塑性に重要なCa2+依存性のセリン/スレオニンキナーゼ(CaMKII)のαおよびβサブユニットをコードするCAMK2A, CAMK2B遺伝子のde novo変異を同定し、変異体ではCa2+非存在下の自己抑制が障害され、リン酸化が亢進していると考えられる知見を得た。また、小胞体に局在し、自然免疫に重要なToll様受容体タンパク質などの正しい折り畳みと細胞内の分布に関与するCNPY3遺伝子の劣性変異を同定し、患者で認められる所見と類似する脳波異常がCnpy3ノックアウトマウスで観察された。

3) 変異ノックインマウスモデル: CRISPR/Cas9ゲノム編集システムを用いてヒト変異をノックインした4系統のマウスにおいて、組織学的あるいは行動学的な異常を認めた。特に2系統では患者と類似した症状が認められており、モデルマウスとして病態解明に寄与すると考えられる。また、内在性の発現が極めて低く、特異的な抗体が市販されていない原因遺伝子に関しては、FlagおよびHAタグをゲノム編集で挿入することに成功した。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

新規責任遺伝子の報告もできており、変異ノックインマウスによる分子病態の解明も順調に進んでいる

Strategy for Future Research Activity

良い疾患モデルマウスが得られており、網羅的プロテオーム解析による更なる病態解明を推進する。

  • Research Products

    (24 results)

All 2018 2017 2016

All Journal Article (18 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 18 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 5 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] De novo variants in CAMK2A and CAMK2B cause neurodevelopmental disorders2018

    • Author(s)
      Akita Tenpei、Aoto Kazushi、Kato Mitsuhiro、Shiina Masaaki、Mutoh Hiroki、Nakashima Mitsuko、Kuki Ichiro、Okazaki Shin、Magara Shinichi、Shiihara Takashi、Yokochi Kenji、Aiba Kaori、Tohyama Jun、Ohba Chihiro、Miyatake Satoko、Miyake Noriko、Ogata Kazuhiro、Fukuda Atsuo、Matsumoto Naomichi、Saitsu Hirotomo
    • Journal Title

      Annals of Clinical and Translational Neurology

      Volume: 5 Pages: 280~296

    • DOI

      10.1002/acn3.528

    • Peer Reviewed / Open Access
  • [Journal Article] De novo HDAC8 mutation causes Rett-related disorder with distinctive facial features and multiple congenital anomalies2018

    • Author(s)
      Saikusa Tomoko、Hara Munetsugu、Iwama Kazuhiro、Yuge Kotaro、Ohba Chihiro、Okada Jun-ichiro、Hisano Tadashi、Yamashita Yushiro、Okamoto Nobuhiko、Saitsu Hirotomo、Matsumoto Naomichi、Matsuishi Toyojiro
    • Journal Title

      Brain and Development

      Volume: 40 Pages: 406~409

    • DOI

      10.1016/j.braindev.2017.12.013

    • Peer Reviewed
  • [Journal Article] Loss-of-function and gain-of-function mutations in PPP3CA cause two distinct disorders2018

    • Author(s)
      Mizuguchi Takeshi、Nakashima Mitsuko、Kato Mitsuhiro、Okamoto Nobuhiko et al. Saitsu Hirotomo、Matsumoto Naomichi
    • Journal Title

      Human Molecular Genetics

      Volume: 27 Pages: 1421~1433

    • DOI

      10.1093/hmg/ddy052

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Biallelic Variants in CNPY3 , Encoding an Endoplasmic Reticulum Chaperone, Cause Early-Onset Epileptic Encephalopathy2018

    • Author(s)
      Mutoh Hiroki、Kato Mitsuhiro、Akita Tenpei、Shibata Takuma、Wakamoto Hiroyuki、Ikeda Hiroko、Kitaura Hiroki、Aoto Kazushi、Nakashima Mitsuko、Wang Tianying、Ohba Chihiro、Miyatake Satoko、Miyake Noriko、Kakita Akiyoshi、Miyake Kensuke、Fukuda Atsuo、Matsumoto Naomichi、Saitsu Hirotomo
    • Journal Title

      The American Journal of Human Genetics

      Volume: 102 Pages: 321~329

    • DOI

      10.1016/j.ajhg.2018.01.004

    • Peer Reviewed
  • [Journal Article] Integrative Analyses of De Novo Mutations Provide Deeper Biological Insights into Autism Spectrum Disorder2018

    • Author(s)
      Takata Atsushi、Miyake Noriko、Tsurusaki Yoshinori、Fukai Ryoko et al.
    • Journal Title

      Cell Reports

      Volume: 22 Pages: 734~747

    • DOI

      10.1016/j.celrep.2017.12.074

    • Peer Reviewed
  • [Journal Article] De novo variants in SETD1B are associated with intellectual disability, epilepsy and autism2018

    • Author(s)
      Hiraide Takuya、Nakashima Mitsuko、Yamoto Kaori、Fukuda Tokiko、Kato Mitsuhiro、Ikeda Hiroko、Sugie Yoko、Aoto Kazushi、Kaname Tadashi、Nakabayashi Kazuhiko、Ogata Tsutomu、Matsumoto Naomichi、Saitsu Hirotomo
    • Journal Title

      Human Genetics

      Volume: 137 Pages: 95~104

    • DOI

      10.1007/s00439-017-1863-y

    • Peer Reviewed
  • [Journal Article] Detection of copy number variations in epilepsy using exome data2018

    • Author(s)
      Tsuchida N.、Nakashima M.、Kato M. et al. Saitsu H.、Miyatake S.、Matsumoto N.
    • Journal Title

      Clinical Genetics

      Volume: 93 Pages: 577~587

    • DOI

      10.1111/cge.13144

    • Peer Reviewed
  • [Journal Article] Epileptic apnea in a patient with inherited glycosylphosphatidylinositol anchor deficiency and PIGT mutations2018

    • Author(s)
      Kohashi Kosuke、Ishiyama Akihiko、Yuasa Shota、Tanaka Tomomi、Miya Kazushi、Adachi Yuichi、Sato Noriko、Saitsu Hirotomo、Ohba Chihiro、Matsumoto Naomichi、Murakami Yoshiko、Kinoshita Taroh、Sugai Kenji、Sasaki Masayuki
    • Journal Title

      Brain and Development

      Volume: 40 Pages: 53~57

    • DOI

      10.1016/j.braindev.2017.06.005

    • Peer Reviewed
  • [Journal Article] A patient with early myoclonic encephalopathy (EME) with a de novo KCNQ2 mutation2018

    • Author(s)
      Kojima Karin、Shirai Kentaro、Kobayashi Mizuki、Miyauchi Akihiko、Saitsu Hirotomo、Matsumoto Naomichi、Osaka Hitoshi、Yamagata Takanori
    • Journal Title

      Brain and Development

      Volume: 40 Pages: 69~73

    • DOI

      10.1016/j.braindev.2017.06.004

    • Peer Reviewed
  • [Journal Article] Delineating SPTAN1 associated phenotypes: from isolated epilepsy to encephalopathy with progressive brain atrophy2017

    • Author(s)
      Syrbe Steffen、Harms Frederike L、Parrini Elena、Montomoli Martino et al.
    • Journal Title

      Brain

      Volume: 140 Pages: 2322~2336

    • DOI

      10.1093/brain/awx195

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Three Cases of KCNT1 Mutations: Malignant Migrating Partial Seizures in Infancy with Massive Systemic to Pulmonary Collateral Arteries2017

    • Author(s)
      Kawasaki Yuki、Kuki Ichiro、Ehara Eiji、Murakami Yosuke、Okazaki Shin、Kawawaki Hisashi、Hara Munetsugu、Watanabe Yoriko、Kishimoto Shintaro、Suda Kenji、Saitsu Hirotomo、Matsumoto Naomichi
    • Journal Title

      The Journal of Pediatrics

      Volume: 191 Pages: 270~274

    • DOI

      10.1016/j.jpeds.2017.08.057

    • Peer Reviewed
  • [Journal Article] Equivalent missense variant in the FOXP2 and FOXP1 transcription factors causes distinct neurodevelopmental disorders2017

    • Author(s)
      Sollis Elliot、Deriziotis Pelagia、Saitsu Hirotomo、Miyake Noriko、Matsumoto Naomichi、Hoffer Mari?tte J.V.、Ruivenkamp Claudia A.L.、Alders Mari?lle、Okamoto Nobuhiko、Bijlsma Emilia K.、Plomp Astrid S.、Fisher Simon E.
    • Journal Title

      Human Mutation

      Volume: 38 Pages: 1542~1554

    • DOI

      10.1002/humu.23303

    • Peer Reviewed
  • [Journal Article] Defects in autophagosome-lysosome fusion underlie Vici syndrome, a neurodevelopmental disorder with multisystem involvement2017

    • Author(s)
      Hori Ikumi、Otomo Takanobu、Nakashima Mitsuko et al.
    • Journal Title

      Scientific Reports

      Volume: 7 Pages: -

    • DOI

      10.1038/s41598-017-02840-8

    • Peer Reviewed / Open Access
  • [Journal Article] Identification of novel BCL11A variants in patients with epileptic encephalopathy: Expanding the phenotypic spectrum2017

    • Author(s)
      Yoshida M.、Nakashima M.、Okanishi T.、Kanai S.、Fujimoto A.、Itomi K.、Morimoto M.、Saitsu H.、Kato M.、Matsumoto N.、Chiyonobu T.
    • Journal Title

      Clinical Genetics

      Volume: 93 Pages: 368~373

    • DOI

      10.1111/cge.13067

    • Peer Reviewed
  • [Journal Article] Novel biallelic SZT2 mutations in 3 cases of early-onset epileptic encephalopathy2017

    • Author(s)
      Tsuchida N.、Nakashima M.、Miyauchi A.、Yoshitomi S.、Kimizu T.、Ganesan V.、Teik K.W.、Ch'ng G.-S.、Kato M.、Mizuguchi T.、Takata A.、Miyatake S.、Miyake N.、Osaka H.、Yamagata T.、Nakajima H.、Saitsu H.、Matsumoto N.
    • Journal Title

      Clinical Genetics

      Volume: 93 Pages: 266~274

    • DOI

      10.1111/cge.13061

    • Peer Reviewed
  • [Journal Article] A patient with Muenke syndrome manifesting migrating neonatal seizures2017

    • Author(s)
      Okubo Yukimune、Kitamura Taro、Anzai Mai、Endo Wakaba、Inui Takehiko、Takezawa Yusuke、Suzuki-Muromoto Sato、Miyabayashi Takuya、Togashi Noriko、Oba Hiroshi、Saitsu Hirotomo、Matsumoto Naomichi、Haginoya Kazuhiro
    • Journal Title

      Brain and Development

      Volume: 39 Pages: 873~876

    • DOI

      10.1016/j.braindev.2017.05.007

    • Peer Reviewed
  • [Journal Article] A novel mutation in the proteolytic domain of LONP1 causes atypical CODAS syndrome2017

    • Author(s)
      Inui Takehiko、Anzai Mai、Takezawa Yusuke、Endo Wakaba、Kakisaka Yosuke、Kikuchi Atsuo、Onuma Akira、Kure Shigeo、Nishino Ichizo、Ohba Chihiro、Saitsu Hirotomo、Matsumoto Naomichi、Haginoya Kazuhiro
    • Journal Title

      Journal of Human Genetics

      Volume: 62 Pages: 653~655

    • DOI

      10.1038/jhg.2017.11

    • Peer Reviewed
  • [Journal Article] PARS2 and NARS2 mutations in infantile-onset neurodegenerative disorder2017

    • Author(s)
      Mizuguchi Takeshi、Nakashima Mitsuko、Kato Mitsuhiro、Yamada Keitaro、Okanishi Tohru、Ekhilevitch Nina、Mandel Hanna、Eran Ayelet、Toyono Miyuki、Sawaishi Yukio、Motoi Hirotaka、Shiina Masaaki、Ogata Kazuhiro、Miyatake Satoko、Miyake Noriko、Saitsu Hirotomo、Matsumoto Naomichi
    • Journal Title

      Journal of Human Genetics

      Volume: 62 Pages: 525~529

    • DOI

      10.1038/jhg.2016.163

    • Peer Reviewed
  • [Presentation] 先天異常疾患と体細胞モザイク変異2017

    • Author(s)
      才津 浩智
    • Organizer
      第57回日本先天異常学会学術集会
    • Invited
  • [Presentation] 遺伝カウンセラーが知っておくべき、網羅的遺伝子解析の実際と注意点2017

    • Author(s)
      才津 浩智
    • Organizer
      2017年度第一回認定遺伝カウンセラーセミナー
    • Invited
  • [Presentation] Genetic Diagnosis of Epileptic Syndrome Using Next Generation Sequencing2017

    • Author(s)
      才津 浩智
    • Organizer
      The 21th Annual & Scientific Meeting of Taiwan Child Neurology Society.
    • Invited
  • [Presentation] From identification of pathological variants to understanding mechanisms of epileptic syndromes: novel genes and potential mechanisms2017

    • Author(s)
      才津 浩智
    • Organizer
      The 21th Annual & Scientific Meeting of Taiwan Child Neurology Society.
    • Invited
  • [Presentation] Identification of STXBP1 mutations in patients with Ohtahara syndrome2017

    • Author(s)
      才津 浩智
    • Organizer
      14th Asian and Oceanian Congress of Child Neurology.
    • Int'l Joint Research / Invited
  • [Patent(Industrial Property Rights)] 重度の知的障害及び運動発達遅滞を伴う難治性てんかんの検出方法2016

    • Inventor(s)
      松本直通、才津浩智
    • Industrial Property Rights Holder
      公立大学法人横浜市立大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      特許第6304831号

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Published: 2018-12-17  

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